Molding-bit.



PATENTED JAN. 30, 1906.

J. BOYD. MOLDING BIT. APPLICATION FILED MAE.15, 1905.

2 mama-$112111! 1.

PATBNTED JAN. 30, 1906.

J. BOYD. MOLDING BIT. APPLICATION FILED MAR.16, 1905.

2 SHEETS-SHEET Z.

1 I I I r l I 4 4 r 0 ll JOHN BOYD, OF BESSEMER, ALABAMA.

MOLDlNGw-BIT.

Application filed March 15, 1905.

T0 all whom, it may concern:

Be it known that I, J OHN BOYD, a citizen of the United. States ofAmerica, residin at Bessemer, in the county of Jefferson and State ofAlabama, have invented. certain new and useful Improvements inMolding-Bits, of which the following is a specification.

This invention relates to working-machines of the type sometimes termedwood-rnolding machines, designed for the manufacture of wood-moldingstrips.

To this end the invention primarily has in view a novelv constructionand arrangement of molding-bits in conjunction with suitably adjustedand disposed bracing-guides to provide means for adapting the ordinarydoublesurfacing woodworkingmachine for dressing a plurality ofmolding-bits out of a single plank or board as it passes through the machine.

With these and other objects in view, which will more readily appear asthe nature of the invention is better understood, the same consists inthe novel construction, combination, and arrangement of parts, whichwill be hereinafter more fully described, illustrated, and claimed.

The essential features of the invention involved in the novelconstruction and arrangement of molding-bits and the bracing-guidesassociated therewith are susceptible to structural modification withoutdeparting from the scope of the invention; but a preferred embodiment ofthe latter is shown in the accompanying drawings, in which-- Figure 1 isa diagrammatic sectionalview of a double-surfacing planer-machineequipped with the improvements contemplated. by the resent invention.Fig. 2 is a plan view of the same. Fig. 3 is an enlarged detailperspective view showing the lower rotary cutter with its improved bitshown in operative relation to the bracing-guide and the molding-stripbeing manufactured. Fig. 4 is an enlarged. elevation showing the upperand lower sets of molding-bits in complemental relation and illustratingthe quarter-round molding cut thereby. Fig. 5 is an enlarged detail endview of one of therotary cutterheads, showing the method of attachmentof the molding-bits thereto. Figs. 6 and 7 are detail elevations, resectively, of an uper and a lower molding-git such as employer in thepresent invention.

Like reference characters designate corre- Specification of LettersPatent.

Patented Jan. 30, 1906.

Serial No. 250,138.

spending parts in the several figures of the drawings.

In carrying out the present invention the improvements contemplated maybe adapted to any ordinary type of double-surfacing molding-machine inwhich rotary cutters are arranged above and below the plane of thefeed-table and which cutters are operated. by the usual driving devices.Also in machines of this type suitable feeding mechanism is employed forpassing the timber through the machine in a plane between the upper andlower cutters; but as no claim is made herein to the means for drivingthe cutters nor to said feeding mechanism there is simply shown in thedrawings for illustrative purposes a portion of the stand 1 of adouble-surfacing mol-ding-machine, which stand carries the usualhorizontal feed-table '2, upon which is fed the plank or board M throughthe medium of a feeding mechanism. (Not shown.)

In adapting the improvements to a machine of the character referred tono change is required in the construction or location .of the upper andlower rotary cutter-heads 3 and 4, which are respectively supported tooperate in planes above and below the feedtable 2, though, as usual inmachines of this character, the bits of the lower rotary head 4 operatethrough a cutter-slot 5, provided in the feed-table, so as to expose theunder side of the board M to the action of the lower cutter.

The upper and lowerrotary cutter-heads 3 and 4 are disposed in differentvertical planes and are provided in the flat faces thereof withlongitudinally-disposed T-shaped slots 6, designed to adjustably receivetherein. the correspondingly-shaped fastening-bolts 7 for themolding-bits, and in carrying out the present invention a pair ofmolding-bits are associated with each cutter-head, one pair of bitsconstituting a complete set for each head.

Referring to the upper cutter-head 3, the present invention provides forapplying to the diametrically opposite sides of such head through themedium-of the fastening-bolts 7 a pair of molding-bits 8, eachconsisting of a flat plate having in one edge thereof adjustmentslots 9to receive the fastening- .bolts 7 and provided along their workingedges with a continuous series of straight V- shaped beveled planerteeth 10. A plural number of planer teeth 10 is always provided alongthe working edges of the upper molding-bits 8, according to the numberof quarter-round individual molding-strips to be cut from the board orplank, and at this point it will be observed that, restricted only bythe length of the cutter-head, any number of the separate molding-bits 8may be employedin any event providing means for dressing off in oneoperation the upper angu lar side portions of the strips to be formedout of asingle board or plank. A corresponding construction andarrangement prevails in connection with the lower rotary cutterhead 4.However, the lower bits 11, applied to diametrically opposite sides ofthe lower head 4, are provided in one edge with adjustment-slots 12 forthe fasteningbolts and along their Working edges with a plurality ofcontinuous curved V-shaped bits 13, whose curved portions are not onlybev'eled, but struck on arcs, each of which is a quarter of a circle, toprovide means for dressing the lower side of the plank intoquarter-round strips, as plainly shown in Fig. 4 of the drawings.

The number of teeth 13 on the lower bits and also the number of lowerbits correspond to the teeth and number of the upper bits, so that thecomplete upper and lower sets of bits usually bear a true complementalrelation.

Directly above the plane of operation of the lower cutter-head 4 andalso immediately in front of the plane of operation of the uppercutter-head guide, the separate bracing-guides being des ignated,respectively, by the reference-numbers 14 and 15. Each of thebracing-guides 14 preferably consists of a Wooden section of the boardas dressed by the upper rotary cutter alone, thus presenting at thelower surface of each of said guides a V-shaped angular corrugatedguiding-face 16, registering in the correspondingly-corrugated upperside of the board or plank. Each of the wooden bracing-guides 14 isrigidly secured to the fiat under side of a brace-holding head 17,provided with an upstanding slotted carryingarm 18, receiving ashiftable adjusting-screw 3 is arranged a bracing 19, arranged to workin a longitudinally-disposed slot 20, formed in a horizontally-disposedsupporting-bracket 21, carried upon the stand or framework of themachine. The head of the adjusting-screw 19 is preferably held in akeeper seat or channel 22, formed longitudinally in one face of thebracket 21.

From the foregoing it is thought that the construction, operation, andadvantages of the herein-described machine will be readily apparentwithout further description, and it will be understood that variouschanges in the form, proportion, and minor details of construction maybe resorted to without departing from the spirit of the invention orsacrificing any of the advantages thereof.

Having thus described the invention, what is claimed, and desired to besecured by Letters Patent, is

In a double-surfacing molding-machine, the combination of ahorizontalfeedtable, of upper and lower cutter-heads arranged respectively aboveand below the plane of the table and in different vertical planes, saidcutter-heads being spread a distance apart, molding bits adjustablyfitted to the upper head and provided with a succession of straightV-shaped teeth, molding-bits adjustably fitted to the lower headandprovided with a succession of continuous curved V- shaped teeth, avertically and horizontally adjustable holder arranged over thefeedtable directly above the lower cutter, a similarly-adjustable holderalso arranged over the feed-table on one side of the vertical plane ofthe upper cutter, both of said holders having fiat brace-holding heads,and a wooden bracing-guide rigidly secured to each holdinghead, eachwooden bracing-guide consisting of a Wooden section of board dressed bythe upper rotary cutter alone.

In testimony whereof I afliX my signature in presence of two Witnesses.

JOHN BOYD.

Witnesses:

W. M. DOYLE, F. L. EMIL.

